My car isn't putting down much more than stock power yet in slow tight turns on the track I'm often able to light up both front tires coming out the corners resulting in horrible understeer.

Since I track my car almost once a week during the summer months I'm quite interested in solving this issue.

I'm looking at the SCE torsen based center diff in order to have more torque sent to the rear wheels. However the SCE center diff isn't exactly cheap or quick to install.

Therefore I'd like to know from those of you that have actually installed the SCE torsen center diff, how did it affect your handling?

Did it reduce understeer? Is it more "predictable" than the stock diff? How hard was it to install and shim?